Has my IQ dropped since becoming the mother to 2 teenage girls?

As the mother of two teenage daughters, apparently my IQ has dropped at least 20 points, according to my daughters. Yesterday, it was a record 105 degrees or so, and my youngest announces that she wants to go on a walk and to the local park for a few hours in the heat of the day. Of course, prior to this announcement, she has spent much of the summer on the couch watching reruns of "America's Next Top Model," which is really intellectually challenging (for a two year old), or posting pictures she has taken of herself on her My Space page. So, the sudden desire to spend time outside is quite the change. But, when I ask what is really up, she seems surprised at my question. "What do you mean, Mom? I just want to spend some time outside." Yeah, right, and Mark Sanford just wanted to hike the Appalachian trail. Turns out that she was meeting a boy at the park....sound familiar? Too bad that she does not read the news or she would have known that that story would not fly. Just ask Gov. Sanford.